Copy JKernel (#126)

* start JSystem

* JKRAram and JUTGamePad

* started heap and thread

* more JKernel

* mostly finished JKernel

* delete unused asm

* JKRFileFinder

* delete unused asm and match findNextFile

* format

* fix mtx_vec

include/JSystem/JSupport/JSURandomInputStream.h

@@ -0,0 +1,25 @@
+#ifndef JSURANDOMINPUTSTREAM_H_
+#define JSURANDOMINPUTSTREAM_H_
+
+#include "JSystem/JSupport/JSUInputStream.h"
+#include "dolphin/types.h"
+
+class JSURandomInputStream : public JSUInputStream {
+public:
+    JSURandomInputStream();
+    virtual ~JSURandomInputStream();
+
+    /* vt[3] */ virtual s32 getAvailable() const; /* override */
+    /* vt[4] */ virtual s32 skip(s32);            /* override */
+    /* vt[5] */ virtual s32 readData(void*, s32) = 0;
+    /* vt[6] */ virtual s32 getLength() const = 0;
+    /* vt[7] */ virtual s32 getPosition() const = 0;
+    /* vt[7] */ virtual s32 seekPos() = 0;
+
+    // TODO: fix return types
+    /* 802DC370 */ void align(s32);
+    /* 802DC458 */ void peek(void*, s32);
+    /* 802DC4DC */ void seek(s32, JSUStreamSeekFrom);
+};
+
+#endif